How do I curve an overlay?

I have a perspective image of a tube station. I want to replace an image of a poster with a different one. So I need to apply perspective (I can do this) and make the resultant image curved, to fit the curved wall.
Hope my description's clear, how do I achieve this?
Thanks

Several things to explore... One is to use "Filter/Distorts/Curve bend" on the poster (before perspective, I'd say). You can also map bitmaps over a cylinder (Filter/Map/Map object) but that maps outside the cylinder and not inside it. However I think one only needs an image reversal to make it appear as being the inside... then apply perspective.

(Oct 2, 2011 22:56)ofnuts Wrote: Several things to explore... One is to use "Filter/Distorts/Curve bend" on the poster (before perspective, I'd say). ...

Thanks, exactly what I wanted. I found it easier to apply perspective first, as the perspective changed the curve. By trialanderror I got the right result.

Just for kicks I tried the other method: map to cylinder and perspective. If you use a transparent background and transparent layers for the caps,you indeed see the inside of the cylinder, so if you flip things correctly you end up with readable text. Lots of trial and error, too (until I found the wireframe preview, that is ) However the text loses some sharpness in the process.

(Oct 3, 2011 12:39)ofnuts Wrote: ....
Just for kicks I tried the other method: map to cylinder and perspective. If you use a transparent background and transparent layers for the caps,you indeed see the inside of the cylinder, so if you flip things correctly you end up with readable text. Lots of trial and error, too (until I found the wireframe preview, that is ) However the text loses some sharpness in the process.
....

Amen, the wireframe preview is a hidden gem that took me a couple of hours to notice why it is there as well.... but now. Hallelujah!